I revisited old questions I asked a long time ago for which I didn't accept any answers.

It was somewhat problematic.

I do not need an answer any more. For some reason, the question is now irrelevant (abandoned project or whatever).

I do not even recall if I solved the issue or not

If I did solve it, I do not recall if it was using the answer or not.

In some cases, I didn't dig enough in the issue to gain enough experience to pick an answer

Should I blindly accept the seemingly best answer, delete the question or just leave it there to rot?

I was considering deletion because the answers might be bad. Someone with a similar issue might be dissatisfied with the answers and having the question already asked, he might not ask it again (duplicate).

2 Answers
2

Are the questions still useful? See if you can edit them into a form that future visitors might find useful by removing noise, adding detail, or whatever else needs to be done to make it into a good questions. Maybe you can nudge the question from something fairly open-ended into something which at least supports its highest voted answer.

If the questions aren't useful (maybe the question is now too localized or not a real question, or even a dupe of another question) you can flag appropriately, or vote to close. Or even delete your own question - if it's really a waste of cognitive effort for everyone who sees it, it can go away.